tried diafine many years ago. when it works, it works great. it is panthermic(wide temperature range), but is very sensitive to contamination, ie, make sure tanks and reels are squeeky clean. anyway, i never got consistent results with it, probably my fault. claimed boost in exp. index may be a little optimistic. found acu-one to be a better bet. great, consistent results. jim(posted 9204 days ago)